1.

A 1.00 molar .aqueous solution of trichloroacetic acid ("CCl"_(3)"COOH") is heated to its boiling point. The solution has the boiling point of 100.18 ""^(@)C. Determine the Van't Hoff factor for trichloroacetic acid. (K_(b) "for water" = 0.512 "kg mol"^(-1)).

Answer»

SOLUTION :`DELTA T_(b) = iK_(b)`m
`(100.18 - 100)^(@)C = I XX 0.512 k" mol"^(-1) xx 1 ` m
0.18 K = i`xx 0.512` K g `mol^(-1) xx 1` m
i= 0.35
OR
(i) Mole fraction is the ratio of number of moles of one component to the total number of moles in a mixture.`"" `[ Or mathematical expression ]
`x_(A) = (n_(A))/(n_(A) + n_(B))`
Where `n_(A)`= number of moles of component A. `n_(B)` = number of moles of component B.
(ii) Solution which obey Raoult.s law over the ENTIRE range of concentration are called ideal solutions.


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